Wallis, P.N. <br/><br/>
Machine accounting and accounts office practice/ 
P.N. Wallis 
 - London:  Sir ISAAC Pitman,  1948 
 - 257 p.:  ill.;  21 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Office practice--Automation<br/>Electronic data processing<br/>Electronic office machines
<br/><br/><label>Dewey Class. No.: </label>651.264